Smith's CSCS 4-in-1 Knife and Scissors Sharpener Pre-set Crossed Carbide Blades Provide Quick Edge Setting Reversible and Replaceable Carbide Blades & Ceramic Stones Extend Sharpening Pre-set Crossed Steel Rods Offer Perfect Edge Alignment Specially Shaped Ceramic stones Provide a Razor Sharp Edge on Serrated or Standard Blades Sharpens Left or Right Handed Scissors